Review on Amplim 64GB V90 UHS-II SD SDXC Card: Lightning Speed, 300MB/S, Secure Digital Memory Storage for Pro Photographer and Videographer by Aaron Jensen

I need a second high-speed UHS-II SDXC card to backup my Lexar 32GB UHS-II SDXC card. Normally I would just buy another Lexar card, but since they aren't currently available I bought an Amplim card based on its speed ratings. Unfortunately, these estimates are not very accurate. When the card arrived I tested it on both my Lexar UHS-II card and another Lexar card, this time the UHS-I. The Amplim card showed high read speed but very low write speed. I have attached 3 screenshots. All speed tests are conducted using the BlackMagic speed test app and each is marked with a tested card. As you can see, the Amplim card is fairly fast on reads but almost as slow on writes as my Lexar UHS-I card and because I bought this card to use in my digital camera's UHS-II slot , it's too slow to read. use. i will return it Speed test images from left to right: Lexar UHS-II card, Lexar UHS-I card, and Amplim card. They were all tested using the same computer, the same UHS-II card reader, and the same testing software.